Oil-controller.



A. L. JOHNSON.

OIL CONTROLLER. APPLICATSON FILED 1ULY13. 1914.

1,173,976. r v Patented Feb. 29, 1916.

THE COLUMBIA PLANOGRAPH ,co.,' \vAsHlNG'roN, D. c.

ALBERT L. JOHNSON, or LULING, TEXAS.

OIL-CONTROLLER.

Specification of Letters Patent.

Patented Feb. 29, 191

" Application filed July 13, 1914. Serial No. 850,749.

such as will enable others skilled in the art to which it appertainstomake and use the same. V

This invention relates to burners such as are used in connection withsteam boilers or the like.

More especially the invention relates to means of automaticallycontrolling the flow of fuel and air or steam to the boiler burner.

The principal object of the invention is to improve and simplify thegeneral construction of devices of this character.

A second object of the invention is to provide an improved device whichwill automatically control, at the same time, both the fuel and the airor steam supply valves so that as the boiler pressure rises or falls thevalves will be closed or opened in accordance with the variation ofboiler pressure.

l/Vith the above and other objects in view the invention consists ingeneral ofcertain novel details of construction and combinations ofparts hereinafter fully described, illustrated in the accompanyingdrawings, and specifically claimed.

In the accompanying drawings, like characters of reference indicate likeparts in the several views, and Figure 1, is a plan view of the deviceapplied to a boiler. Fig. 2, is a front elevation of the device. Fig. 3,is a section on the line 3-3 of Fig. 1. Fig. 4 is a section on the line41 of Fig. 2. Fig. 5, is a detailed view of a cross bar used herewith.Fig. 6, is an enlarged detailed section showing the manner of adjustingthe spring used herewith for different degrees of tension.

In carrying out the'objects of this invention there is provided acylinder pin which has anupper end closed by a plate 11 centrallyprovided with a threaded opening 12 whereto is secured a pipe 13 whichleads to' the steam space of a boiler 14. 1V ithin this cylinder is apiston 15 fitted withthe usual follower plate 16 and cup 17. At thelower end of the cylinder 10 is a diaphragm 18 and the piston rod 19extends through this diaphragm and is secured in the usual manner to thepiston 15. Above this diaphragm 18 is a plate 20 which is adjusted withrespect to the diaphragm bymeans of the screws 21 and on this platerests one end of a coil spring 22, the other end of this spring bearingon the piston 15. By means of these screws 21 the tension of the springsmay be adjusted as can be readily seen.

Extending downward from the lower end of the cylinders 10 are yokemembers 23 and these members are preferably formed inte ral with thecylinder 10 and have at their lower ends a fitting 24 formed with aguide pocket 25 in its upper surface, the piston rod having its lowerend located in said guide pocket. The fitting 24 is provided with aT-shaped passage 26 and to the branches of this passage are fittedrespectively the fuel pipe 27 and the steam or air pipe 28, it beingunderstood that either liquid or gaseous fuel may be used. Each of thesepipes 27 and 28 is provided with a valve casing 29 having a seat 30therein and on these seats 30 are adapted to fit the valves 31. Each ofthese valves 31 has an upwardly extending stem 32 which has its upperend threaded as at 33. The piston rod 19 is also threaded as at 34:.Extending across the device is a bar 35 which has circular openingsadjacent its ends and in its center for the reception of the stems 32and the piston rod 19. This bar is held in position on the rod 19 bymeans of the nuts 36 and similarly the bar is held by nuts 37. Extendingfrom the stem of the T-shaped passage 26 is a connection 38 to theburner in the fire box of the boiler.

In using the device the tension of the spring 22 is properly adjustedand also the valves 31 are adjusted by means of the nuts 37 Now when theboiler pressure rises the piston 15 will be forced downward and thuscarrying with it the valves 31 so that the valves will partially orwholly close the openings in the valve seats thus the supply of fuel andair or steam is reduced as the boiler pressure rises and consequentlythe heat in the fire box is reduced which results in a decrease of theboiler pressure and the restoration of the piston to its position. Inlike manner if the boiler pressure falls the spring 22 will force thepiston upward and open the valves to a greater degree so that anincreased flow of fuel and air are seen takes place with the result ofincreasing the heat in the fire box and thus raising the boiler pressureto its proper point. There has thus been provided a simple and eflicientdevice of the kind described and of theehar-v acter specified.

struction of this invention without departing from the materialprinciples thereof. "It ,islnot therefore desired to confine; theinvention to the exact form herein shoavnanddescribed but it is Wishedto include all such as" come properly ithin the scope .elaimed.

Having thus'describedthe invention, ,What' is claimed as new is:

Id a r ato Q f h d ri ed oylinder, a yoke depending from the eylinderand having longitudinal slots for-med in its arms, a bar slidably-fmoiinted in the slots, i a fitting ,carried by the lower ends of the y ams, a uid iwqkef; te m sen n -1y the fitting, means'forbonn'ecting thecyl'-' V inder to a boiler, 'a rrpiston movable in the cylinder, L-aL-rOd :for' the piston having its lower end slidably engaged in thepocket, a

i h fes e 0 tw -W e (lopies of this patQnmay be obtainedtor fiveeentseach, byaddressing the Commissioner of Patent s, Washin on, .02

pluralityofvalves for controlling flow of V 'fluid from the fitting toaburner, stems for the valves, said stems and piston-rod being ,adj nstably c'onneoted to the bar and mova-ble' j therewith, and a spring'forthe piston, and means for regulating the tension of the i

